



'''simple docstring'''






def  lowerCamelCase__			(		_A					,     _A							):

  if density <= 0:
    raise ValueError('Impossible fluid density'							)
  if bulk_modulus <= 0:
    raise ValueError('Impossible bulk modulus'							)

  return (bulk_modulus / density) ** 0.5


if __name__ == "__main__":
     import doctest

     doctest.testmod()




'''simple docstring'''






import numpy as np
def  lowerCamelCase__			(		_A							):
  return 1 / (1 + np.exp(-vector							))
def  lowerCamelCase__			(		_A							):
  return vector * sigmoid(1.702 * vector							)


if __name__ == "__main__":
     import doctest

     doctest.testmod()